13155403 has 4 divisors (see below), whose sum is σ = 13335688. Its totient is φ = 12975120.

The previous prime is 13155397. The next prime is 13155421. The reversal of 13155403 is 30455131.

It is a happy number.

13155403 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30455131 = 7 ⋅4350733.

It is a cyclic number.

It is not a de Polignac number, because 13155403 - 2⁵ = 13155371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13155503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90033 + ... + 90178.

It is an arithmetic number, because the mean of its divisors is an integer number (3333922).

Almost surely, 2^13155403 is an apocalyptic number.

13155403 is a deficient number, since it is larger than the sum of its proper divisors (180285).

13155403 is an equidigital number, since it uses as much as digits as its factorization.

13155403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180284.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 13155403 is about 3627.0377720669. The cubic root of 13155403 is about 236.0666944988.

The spelling of 13155403 in words is "thirteen million, one hundred fifty-five thousand, four hundred three".